We’ve seen Joe Hart make mistakes before. Of late, it’s happened so many times, people are starting to ask what has to happen for him to lose his job.

That sentiment may seem like hyperbole, but in terms of today’s match, it’s hard to imagine a more impactful, more preventable mistake. That it happened early against a team capable of keeping over 70 percent of the ball may have doomed whatever hopes Manchester City had of knocking off Bayern Munich. The holders would go on to win at the Etihad, cruising to a 3-1. And unfortunately for Hart, that seventh minute mistake wasn’t his only blunder.

Allowing Franck Ribéry’s opener was inexcusable, with a strong blast from well beyond the penalty area hopping over Hart’s outstretched arm to beat him near-post. Seven minutes in, Hart had already given a Pep Guardiola team license to hog the ball without pushing for goals. Though no Ribéry shot can be taken lightly, this was a stop you see average goalkeepers regularly parry with ease. On Tuesday, however, it became the latest example in a disturbing list of mistakes from the England No. 1.

Though Hart wasn’t as embarrassed on Bayern’s last two, they were stops other keepers would have made. In the 56th minute, after left back Gaël Clichy was badly beaten on a run from the right wing, Joe Hart had a chance to claim a ball that Thomas Müller’s attempted trap had put within reach. But Hart hesitated, allowed Müller to retain possession, and was helpless to stop a ball that was eventually put into an empty net.

The final goal gave Hart the rare indignity of having allowed a goal from an Arjen Robben right-footed shot. And given the way the play developed, he should have been in better positioned to stop it. In the 59th minute, Toni Kroos stripped Fernandinho at the center line before feeding right to Robben. The Dutch international bore down on left-center half Matija Nastasic, with the Serbian international steering him to the right of goal (onto his weaker right foot). Robben’s one chance was near post, but Hart failed to get in position to protect his goal. The right-footed punch, flying well inside Hart’s post, went off the keeper, off the woodwork and in – Bayern’s third preventable goal.

A stellar finish from Álvaro Negredo would ruin Bayern’s cleansheet, the Spaniards left-footed curler eluding Jerome Boateng at the edge of the area – an unstoppable shot that moved outside then in off Manuel Neuer’s right post. But 11 minutes from time, the goal was pure consolation, even if Boateng would see a straight red in the 86th minute after Yaya Touré raced passed Dante to a ball put behind the defense.

Hart’s troubles shouldn’t overshadow the fact that City were decidedly second best, almost entirely through Bayern’s doing. Even in the few minutes before Ribéry’s opener, the holders looked set to make this into a typical München performance. Although the presence of central defender Vincent Kompany, coming into midfield to challenge early, and surprising right back selection Micah Richards provided a physical dimension that forced Bayern to adjust, that adjustment period didn’t take long. Were it not for the competition name and the expensive collection of talent in Sky Blue kits, you’d swear this we just another one-sided, controlling league affair from the best team in the world.

Per Opta, Bayern held 66 percent of the ball. For most of the game, it was above 70. They outshot their hosts 20-9, getting eight shots on target to City’s two. They hit the woodwork once (as did City) and forced the Sky Blues into six blocked shots. They had 719 passes to City’s 370, with nine of Bayern starters eclipsing Yaya Touré’s City-leading mark (43 passes).

And just like last round’s 3-0 win over CSKA, today’s win provided another illustration of what Guardiola’s tweaks are capable of producing. As great as last season was — so great that nobody dared imagine how it could be better — Bayern didn’t show this kind of strangling control. They were dominant, as their semifinal demolition of Barcelona showed, and they were successful, as any European Cup would affirm. But this type of start-to-finish, whistle-to-whistle suffocation wasn’t there.

Their style was marauding. The waves of their constant attacks were oppressive. The pressure Mario Mandzukic, Robben, Ribèry and Müller exerted prevented lesser competition from collecting hope. Their results (+80 goal difference in league) became embarrassing.

For some reason, Guardiola has decided to change that, and only against competition like CSKA or Manchester City have we seen the end game. Sacrificing the second deep midfielder in a 4-2-3-1 formation for another player higher in a 4-1-4-1, Guardiola has dared to fuse the best of Bayern and Barcelona. He has the audacity to imagine Bayern’s oppression combined with Barcelona’s control.

Manchester City became the first team to see the dream. If Bayern can do this on a week-in, week-out basis, they have a chance to improve on last year’s squad, even if the stats will never reflect it.

Regardless, the defending champions have moved clear in Group D, having taken three points at the home of their stiffest competition.